Complementary colors

Complementary colors are pairs of colors that are of “opposite” hue in some color model. The exact hue “complementary” to a given hue depends on the model in question, and perceptually uniform, additive, and subtractive color models, for example, have differing complements for any given color.
In the RGB color model (and derived models such as HSV), primary colors and secondary colors are paired in this way:
red and cyan
green and magenta
blue and yellow.
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I took this shot in the garden at our holiday house. The image is not HDR processed.